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The design of an in-vivo rotator cuff measuring tool PROJECT UPDATE

University of Pittsburgh Senior Design - BioE1161. The design of an in-vivo rotator cuff measuring tool PROJECT UPDATE. Kathleen Bieryla, Katie Fronczak, Martha Loehr, Eric Rainis. Arthrometric Inc. Overview- Problem. Surgical methods dependent upon ratio of a/b

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The design of an in-vivo rotator cuff measuring tool PROJECT UPDATE

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  1. University of Pittsburgh Senior Design - BioE1161 The design of an in-vivo rotator cuff measuring toolPROJECT UPDATE Kathleen Bieryla, Katie Fronczak, Martha Loehr, Eric Rainis Arthrometric Inc.

  2. Overview- Problem • Surgical methods dependent upon ratio of a/b • Currently there is no tool available to measure these dimensions Scapula Humerus • Length of torn tendon edge • Size of avulsed humeral insertion • Retraction of tendon

  3. Overview- Proposed Solution • The Arthromeasure is a one-handed tool for surgeons to use during arthroscopic surgery in order to measure the extent of rotator cuff tears • Provides accuracy as specified by the user • Allows for correct classification of size of tear, which aids in surgical treatment

  4. Description • Shaft • Length: 15 cm (13 cm exposed) • OD: 4 mm • ID: 0.51 mm (0.020 in) • Handle • 18 cm x 4 cm x 4 cm Initial Design • Alterations: • Dimensions • Propulsion System • Wire Ejection Location • Measurement System Current Design

  5. Gear Mechanism

  6. Features & Benefits • Convenient moving mechanism on the handle • Provides desired accuracy • a: +/- 1 cm • b: +/- 5 mm • Gives surgeon an easy way to determine the best method of repair

  7. Competitive Analysis • Currently, no tool is available • 3mm hook - surgery • String and digital caliper – cadaveric research • Strengths • More accurate • Easy to use • Weaknesses • Inaccuracy comes from surgeon

  8. Team/Resources • MSRC • Patrick McMahon M.D. • Richard Debski Ph.D • Lab and equipment • Swanson Center • Rapid prototyping process • Bioengineering Department • Funding • Limitations • Money • Size of handle

  9. Schedule • February—Initial prototype • Choose final wire material • Purchase gears and assemble • Testing – accuracy and repeatability • March—Cadaveric testing • April—Final product and grant proposal

  10. Team Responsibilites

  11. Road Blocks • Meeting with advisor • Redesign of gear system • Changed based on surgeon’s input • Lack of knowledge

  12. Current Status and Milestones • Solidifying final design • Gear system • Sample materials for shaft and wire • Viewed surgery – ask us what it’s like to be med students! • Updated responsibilities and working plan • First draft of SBIR phase I proposal

  13. Acknowledgements • Dr. Patrick McMahon • Dr. Richard Debski • MSRC • Department of Bioengineering, University of Pittsburgh

  14. QUESTIONS??

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